Análise da fragilidade ambiental na bacia do rio Queima-Pé, Tangará da Serra, MT

This study aims to analyze the environmental fragility of the Queima-Pé river basin, located in Tangará da Serra municipality in the Mato Grosso State (Midwestern, Brazil), to subsidize environmental planning actions. The study area was characterized using the following thematic maps: geomorphology, pedology, land use and vegetation cover, and rainfall. The methodology used was operationalized using ArcGis software of Esri. The Queima-Pé river basin present 11% of the area has high environmental fragility, mainly due to land use that provides little protection to the soil. We conclude that the land use with pasture and sugarcane in the argisoil soils deserve special attention because of the high sand content, which favors erosion.O presente trabalho tem como objetivo analisar a fragilidade ambiental da bacia hidrográfica do Rio Queima-Pé, localizada no município de Tangará da Serra, estado de Mato Grosso (Centro-oeste, Brasil), para subsidiar ações de planejamento ambiental. Para a caracterização da área de estudo foram utilizadas cartas temáticas de geomorfologia, pedologia, pluviosidade, uso da terra e cobertura vegetal. A metodologia adotada foi operacionalizada com o software ArcGis da Esri. A bacia do Rio Queima-Pé apresenta 11% da área com fragilidade ambiental alta, em decorrência do uso da terra que oferece baixa proteção ao solo. Conclui-se que a utilização da terra com pastagens e cana de açúcar em solo argissolo merece atenção especial, pois estes apresentam alto teor de areia em sua composição, favorecendo a ocorrência de processos erosivos

Optimization of a PID Controller within a Dynamic Model of a Steam Rankine Cycle with Coupled Energy Storage

Fusion energy is an appealing option for future energy generation, but also presents unique design challenges. The UK Atomic Energy Authority is leading the Spherical Tokamak for Energy Production (STEP) programme to build a fusion power plant capable of net electricity generation. This work addresses the use of dynamic models in an optimization framework for the design of the thermal power generation cycle for STEP. The optimization of a proportional-integral-derivative controller regulating the power output of a steam Rankine cycle with a coupled thermal energy storage system is presented. A lumped-parameter dynamic model of the system has been implemented. The effectiveness of a controller design is evaluated by simulating the system under a perturbation to the power demand on the system. By minimizing the mean absolute power deviation, there is a reduction of 97 % compared to the initial controller design, as well as a reduction of 95 % in the maximum absolute power deviation and a faster return to setpoint. The optimized design does introduce more oscillations in the system, which are undesirable for control systems and are challenging for the optimization procedure

The LAGUNA design study- towards giant liquid based underground detectors for neutrino physics and astrophysics and proton decay searches

The feasibility of a next generation neutrino observatory in Europe is being considered within the LAGUNA design study. To accommodate giant neutrino detectors and shield them from cosmic rays, a new very large underground infrastructure is required. Seven potential candidate sites in different parts of Europe and at several distances from CERN are being studied: Boulby (UK), Canfranc (Spain), Fr\'ejus (France/Italy), Pyh\"asalmi (Finland), Polkowice-Sieroszowice (Poland), Slanic (Romania) and Umbria (Italy). The design study aims at the comprehensive and coordinated technical assessment of each site, at a coherent cost estimation, and at a prioritization of the sites within the summer 2010.Comment: 5 pages, contribution to the Workshop "European Strategy for Future Neutrino Physics", CERN, Oct. 200

Influência do uso da terra na conservação das massas d'água em sub-bacias do rio Queima-pé, Tangará da Serra-MT/Brasil.

Resumo: O objetivo deste trabalho foi realizar uma análise espaço-temporal do uso e cobertura da terra, através de geotecnologias, buscando diagnosticar sua influência no estado de conservação das massas de águas, referentes às cinco unidades da bacia hidrográfica do rio Queima-pé, situada no município de Tangará da Serra, MT, Brasil. Utilizou-se imagens captadas pelo sensor TM do Landsat 5, dos anos de 1984 e 2011, processadas no Spring, versão 4.3.3 do Inpe e elaborados e quantificados as classes temáticas dos mapas de uso da terra, no Arcgis versão 9.2 da Esri. Identificou-se 12 classes temáticas, destas as mais expressivas foram Pecuária, Floresta Estacional Semidecidual e Cana-de-açúcar. Em geral as massas d?água obtiveram um aumento médio de 0,05% (2,76 ha) em suas áreas, contudo presenciou-se em média 4% (185 ha) de desmatamento, relacionados ao crescimento desordenado da cultura de Cana-de-açúcar, Soja e Influência urbana, principalmente nas sub-bacias Tapera, Cedro e Santa-fé. Portanto, o estado de conservação das massas d?água nas sub-bacias possuem fatores negativos, devido ao uso intenso da terra e contato direto em alguns pontos com as atividades agropastoris e urbanas, que poderá diminuir sensivelmente a qualidade e quantidade da água, com o passar dos anos se não houver um plano de manejo e recuperação destas áreas.Geopantanal 2012

The LAGUNA design study- towards giant liquid based underground detectors for neutrino physics and astrophysics and proton decay searches

The feasibility of a next generation neutrino observatory in Europe is being considered within the LAGUNA design study. To accommodate giant neutrino detectors and shield them from cosmic rays, a new very large underground infrastructure is required. Seven potential candidate sites in different parts of Europe and at several distances from CERN are being studied: Boulby (UK), Canfranc (Spain), Fr\'ejus (France/Italy), Pyh\"asalmi (Finland), Polkowice-Sieroszowice (Poland), Slanic (Romania) and Umbria (Italy). The design study aims at the comprehensive and coordinated technical assessment of each site, at a coherent cost estimation, and at a prioritization of the sites within the summer 2010

A Disturbance Estimation Approach for Online Model-based Redesign of Experiments in the Presence of Systematic Errors

Online Model-Based Redesign of Experiment (OMBRE) strategies represent a valuable support to the development of dynamic deterministic models, allowing for the dynamic update of the experimental conditions to yield the most informative data for the parameter identification task. However, the effectiveness of OMBRE strategies may be severely affected by the presence of systematic modelling errors. In this paper, a disturbance estimation approach is exploited within an OMBRE framework (DEOMBRE) in order to achieve a statistically satisfactory estimation of the model parameters, thus avoiding (or reducing) constraint violations even in the presence of systematic modelling errors. A case study illustrates the benefits of the new approach. © 2011 Elsevier B.V

Online model-based redesign of experiments with erratic models: A disturbance estimation approach

Model-based design of experiment (MBDoE) techniques are a useful tool to maximise the information content of experimental trials when the purpose is identifying the set of parameters of a deterministic model in a statistically sound way. In a conventional MBDoE procedure, the information gathered during the evolution of an experiment is exploited only at the end of the experiment itself. Conversely, online model-based redesign of experiment (OMBRE) techniques have been recently proposed to exploit the information as soon as it is generated by the running experiment, allowing for the dynamic update of the experimental conditions to yield the most informative data in order to improve the parameter identification task. However, the effectiveness of MBDoE strategies (including OMBRE) may be severely affected by the presence of systematic modelling errors as well as by disturbances acting on the system. In this paper, a novel experiment design approach (DE-OMBRE) is presented, where a model updating policy including disturbance estimation (DE) is embedded within an OMBRE strategy in order to achieve a statistically satisfactory estimation of the model parameters as well as to estimate the possible discrepancy between the real system and the model being identified. The procedure allows reducing (or even avoiding) constraint violations, preserving the optimality of the redesign even in the presence of systematic errors and/or unknown disturbances acting on the system. Two simulated case studies of different levels of complexity are used to illustrate the benefits of the novel approach. (c) 2011 Elsevier Ltd. All rights reserved